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The American Psychiatric Association (APA) publishes the DSM. They provide free information on the revision and updates to the manual, as with these examples below:

An Overview of DSM Changes

From the Office of Mental Health. The DSM is the manual that clinical mental health counselors use to assess and diagnose individuals with a mental illness, developmental disorder, or personality disorder such as narcissism or borderline personality. Many diagnoses can have an adverse affect on health insurance rates, life insurance quotes, and employment, to say nothing of the cost to your emotional health.